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Trade, Other Payables and Financial Liabilities - Summary of Trade, Other Payables and Financial Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Trade and other payables [line items] |  |
Account payables | $ 116,554 | $ 104,176
Account payables to related parties | 12,880 | 8,681
Trade payable | 129,434 | 112,857
Other payables and financial liabilities | 1,156 | 7,580
Trade, other payables and financial liabilities | 130,590 | 120,437
Fuel derivative instruments [member] |  |
Trade and other payables [line items] |  |
Other payables and financial liabilities |  | 2,801
Others [member] |  |
Trade and other payables [line items] |  |
Other payables and financial liabilities | $ 1,156 | $ 4,779

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